Exploratory Aims: The investigators will conduct exploratory analyses to examine if the number of continuous weeks of abstinence during treatment, adolescent's motivation to achieve abstinence, attendance, and homework compliance will mediate abstinence following treatment. Additional analyses will examine differences between modalities (MET/CBT vs FFT) on the presumed mediators: MET/CBT will produce greater improvements in adolescent's drug avoidance self-efficacy and FFT will produce greater improvements in family relationships (as measured by the FES). Improvements in drug avoidance self-efficacy and family relationships will mediate improvements in MET/CBT and FFT, respectively. The investigators will also explore potential differences within modality to determine if adding CM enhances the effects of each modalities impact on the presumed mediators of outcome. The results of these analyses will help determine if there is sufficient merit to warrant additional research into mechanisms of action within each modality. Finally, the investigators will conduct an informal cost-effectiveness analysis to derive preliminary estimates of the relative costs of each treatment modality, particularly with respect to treatment engagement/attendance and youth outplacement to restricted settings.